OBI202 with SPA941 and PAP2 issue, no incoming sound

[carlyle705]

I have a SPA941 and a PAP2 connect to OBI202 LAN port, I also setup the port forwarding for both device, for TCP 5060 - 5070 and UDP 16384 - 16482. I'm using freephoneline.ca as service provider. When I make a call using one of the device, no incoming sound. From the web page of both device, I can see there are packets sending out but no packets receiving. When I connect both device to another router, they worked fine and I didn't even have port forwarding setup on the other router. Anyone can help on this issue? Thank you!

[pc44]

Hi carlyle705,

Can you get an official word from freephoneline.ca as to exactly what ports should be forwarded?  I tried searching their website and forum.  I found various recommendations but could not find an "official" or "sticky" recommendation from FPL.

You could try enlarging the UDP port range to something like 16384-16998.  Also, I saw one post where they recommended the forwarding of UDP 13000, albeit for most softphone configurations.

When you are using the OBi202, is it connected directly to a modem with no firewall, or is it connected to another router, which is then connected to a modem?  If you are running a router between the OBI and your internet modem, then setting the OBI in Bridge Mode may be another option.

Lastly, though this may not be the solution you want, the OBi202 does include a DMZ option.  You could try placing your Linksys ATA in that DMZ.  If your problems vanish, then we know it's most likely a NAT issue that can hopefully be resolved by determining precisely which ports need to be forwarded.  Worst case scenario, you could set up your network for a wireshark capture to see exactly what ports would need to be forwarded.

Some ideas,
pc44